SC4503EVB View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC4503EVB

1.3MHz Step-Up Switching Regulator with 1.4A Switch

Semtech Corporation 

POWER MANAGEMENT

Typical Application Circuits

SC4503

5V

C1

4.7µF

L1

10µH

D1

ZHCS400

R3

54.9k

5

1

IN

SW

SC4503

4 SHDN/SS

FB 3

C3

56nF

GND

2

+

D2

24V

_

MM5Z24VT1

C4

C5

22nF

220pF

R4

301k

R1

63.4

R2

63.4

C2

0.22µF

L1: Murata LQH32C

C1: Murata GRM219R60J475K

Figure 9. Driving Two 6 White LED Strings from 5V. Zener diode D2 protects the converter

from over-voltage damage when both LED strings become open.

 2007 Semtech Corp.

15

www.semtech.com

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